scholarly journals Thermo-Gravimetric Analysis of Various Ratio of Blended Phenolic and Epoxy Composites

2019 ◽  
Vol 9 (1) ◽  
pp. 5435-5439 ◽  
Keyword(s):  
Thermal Properties ◽  
Epoxy Resin ◽  
Phenolic Resin ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Optimum Ratio ◽  
Thermo Gravimetric ◽  
Residual Content ◽  
Very High ◽  
Phenolic Composite

Present research deals with the various ratio (0%, 40%, 50%, and 60% by wt%) of phenolic resin and epoxy resin blend composites. Phenolic resin/Epoxy resin blend composites were manufactured by hand lay-up technique and investigated the thermal properties (thermogravimetric analysis) of composites and evaluated optimum ratio of epoxy in phenolic composites. The residual content of pure phenolic was very high however the pure epoxy showed least thermal stable. After blending phenolic resin in epoxy resin, the thermal properties of epoxy/phenolic composite improved.

Curing Process and Heat-Resistance of Polyethersulfone Toughened Epoxy Resins

2017 ◽  
Vol 898 ◽  
pp. 2302-2308
Author(s):  
Jin Li Zhou ◽  
Shu Zhu ◽  
Wen Pin Jia ◽  
Chao Cheng ◽  
Elwathig A.M. Hassan ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Exothermic Peak ◽  
Curing Temperature ◽  
Gravimetric Analysis ◽  
Curing Process ◽  
Thermo Gravimetric ◽  
Rich Phase ◽  
Curing Reaction

In order to improve the toughness of epoxy resin, hydroxyl-terminated polyethersulfone (PES) with various amounts (0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, 20 wt.%) were added to bisphenol A epoxy resin (DER331)/ curing agent DETDA (E100) systems, and the influence of PES contents on curing process and heat-resistance was studied. Non-isothermal DSC was used to determine the curing process of uncured DER331/E100/PES systems at heating rate of 2°C/min, 5°C/min, 7°C/min, 10°C/min and 15°C/min separately, and the apparent activation energy was calculated based on Kissinger method. The morphology of the etched cured DER331/E100/PES systems with different PES contents was observed by SEM. The heat-resistance of these systems was investigated by DSC and TGA. The results showed that with the increasing of PES content the curing exothermic peak, the heat of curing reaction, the initial and final curing temperature all decreased at the first and then increased, indicating that when the PES content was low (5 wt.%, 10 wt.%), PES can facilitate the curing process, while, when PES content up to 15 wt.%, PES can prevent or weaken the curing reaction. SEM results indicated that the phase structure changed drastically depending on the PES content. The systems with 5 wt.% and 10 wt.% PES were epoxy-rich phase, with 15 wt.% PES was co-continuity phase, and with 20 wt.% PES showed complete phase inversion (PES rich phase). The glass transition temperature and thermo gravimetric analysis demonstrated that the addition of PES can increase the heat resistance of cured DER331/E100/PES systems.

Study on the thermal stability of Controlled Permeability Formwork

2011 ◽  
Vol 374-377 ◽  
pp. 1426-1429
Author(s):  
Xiao Meng Guo ◽  
Jian Qiang Li ◽  
Xian Sen Zeng ◽  
De Dao Hong
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Dynamic Mechanical Analysis ◽  
Thermo Gravimetric Analysis ◽  
Mechanical Analysis ◽  
Gravimetric Analysis ◽  
Construction Work ◽  
Thermo Gravimetric ◽  
Excellent Thermal Stability ◽  
Thermal Stability Of

In this study, the thermal properties of a kind of new geotextile materials, so called controlled permeable formwork (CPF), were studied. Thermo-gravimetric analysis showed that the weight of CPF didn’t change much between 0~350 °C. Dynamic mechanical analysis showed that the storage modulus of CPF reduced from 25 MPa to around 10 MPa when the temperature rose to above 100 °C. The strength of sample decreased slightly with the increase of the temperature. The breaking elongation changed slightly with a maximum at 80 °C. The CPF showed excellent thermal stability and was suitable for general use in construction work.

Research on the Basic Properties of the Bamboo Charcoal Bonded Grinding Wheel

2009 ◽  
Vol 416 ◽  
pp. 416-420 ◽  
Author(s):  
Wei Li ◽  
Zhi Yang Song ◽  
Tian Ming Yu ◽  
Bao Gong Geng
Keyword(s):  
Phenolic Resin ◽  
Resin Composite ◽  
Thermo Gravimetric Analysis ◽  
Grinding Wheel ◽  
Gravimetric Analysis ◽  
Bamboo Charcoal ◽  
X Ray Diffraction ◽  
Thermo Gravimetric ◽  
New Material

A new BCB (Bamboo Charcoal Bonded) grinding wheel was developed by bamboo charcoal-phenolic resin composite under vacuum for ELID grinding technology. The pyrolysis behavior of the new bamboo charcoal-phenolic resin material was studied by thermo gravimetric analysis (TGA), and structural characterization of the new material was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD), the friction characteristics was also investigated in this paper.

Toughness and Thermal Properties of a Dimer Acid Modified Tetrafunctional Epoxy Resin

2015 ◽  
Vol 764-765 ◽  
pp. 107-110 ◽  
Author(s):  
Ming Ming Yu ◽  
Bin Feng ◽  
Min Yang ◽  
Li Qi Liu ◽  
Hong Li ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Impact Resistance ◽  
Mechanical Analysis ◽  
Impact Testing ◽  
Gravimetric Analysis ◽  
Thermal Stabilities ◽  
The Impact ◽  
Tetrafunctional Epoxy

In order to improve the toughness of the cured aromatic tetrafunctional epoxy resins in the premise of influencing the thermal properties as little as possible, the aromatic tetrafunctional epoxy named N,N,N’,N’-tetraglycidyl-4,4’-diaminodiphenyl ether (TGDDE) was modified by a dimer carboxylic acid (DFA), and then the epoxies were cured with methyl nadic anhydride (MNA). In the present work, the toughness was characterized with the impact resistance tested by pendulum impact testing. Besides, the thermal properties of the cured epoxy resin were investigated with the thermo-gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The impact testing results indicated that the toughness of the cured resins could be improved after the modification and increased with the increasing content of DFA. The thermal analysis showed that the thermal properties of the cured resins were not influenced obviously since the thermal stabilities of the products could be improved and the glass transition temperature of them were not influenced obviously when the tetrafunctional epoxy modified with appropriate content of DFA.

Influence of F/P on Structure and Thermal Property of Phenolic Resin

2012 ◽  
Vol 500 ◽  
pp. 98-103 ◽  
Author(s):  
Zhi Qin Chen ◽  
Wei Jun Zeng ◽  
Yang Fei Chen ◽  
Wen Kui Li ◽  
Hong Bo Liu
Keyword(s):  
Thermal Properties ◽  
Thermal Property ◽  
Thermo Gravimetric Analysis ◽  
Crosslinking Density ◽  
Char Yield ◽  
Molar Ratio ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Molar Ratios

The influence of F/P on structure and thermal property of resin was studied. Six resins were synthesized with different molar ratios of F/P. These resins were cured by means of temperature and without catalyst. The characterization of the resin was done by Fourier transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TGA) and differential thermo gravimetric analysis (DTG). From the thermal properties of fully cured resins, characteristic properties including pyrolysis temperature and char yield were obtained. A maximum in the benzene ring substitutions, methylene bridge and the result of the thermal properties allow us to say that the resin with F/P molar ratio 1.2 has the highest crosslinking density and highest char yield, over 73%.

Preparation and Flame Retardancy of Waterbased Phosphorous Modified Phenolic Resin

2014 ◽  
Vol 988 ◽  
pp. 40-44
Author(s):  
Yuan Jian Qiao ◽  
Lu Ting Wei ◽  
Gui Long Xu ◽  
Yi Wang ◽  
Jian Hu
Keyword(s):  
Flame Retardancy ◽  
Phenolic Resin ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Result Show ◽  
Ul 94 ◽  
The Stability ◽  
Test Result ◽  
Limited Oxygen

Waterbased phosphorous modified phenolic resin was prepared by introducing a phosphorous monomer. Effect of phenol and aldehyde mol ratio and ODOPM content to the stability was studied. The flammability of the prepared composite material was studied by TGA (Thermo gravimetric analysis), LOI (limited oxygen index) and UL-94 test. The results show that stable phosphorous modified phenolic resin can be prepared. TGA, LIO and UL-94 test result show that the hybrid material presents better flame retardancy.

Influence of Non-Functionalized and Functionalized MWCNTs on Mechanical and Thermal Properties of Epoxy Composites

2010 ◽  
Author(s):  
Shaik Zainuddin ◽  
Mahesh Hosur ◽  
Harish Rao ◽  
Rajib Barua ◽  
Shaik Jeelani ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Thermo Gravimetric Analysis ◽  
Mechanical Analysis ◽  
Flexural Properties ◽  
Mechanical And Thermal Properties ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Functionalized Mwcnts

In this work, SC-15 epoxy resin was modified using 0.1–0.3 wt. % of non-functionalized and functionalized multi-walled carbon nanotubes (MWCNTs) using conventional and solvent based methods. A high-intensity ultrasonic liquid processor was used to disperse MWCNTs in solvent and to obtain a homogeneous molecular mixture of epoxy resin and MWCNTs. Viscosity, dynamic mechanical analysis (DMA), thermo-gravimetric analysis (TGA), tensile and flexure tests were performed on unfilled and 0.1–0.3 wt. % MWCNTs filled SC-15 epoxy. Preliminary results indicate increase in viscosity with increase in MWCNTs wt. % loading and 0.2 wt. % MWCNTs epoxy samples showed the highest improvement in tensile and flexural properties as compared to the neat system. DMA studies also revealed that 0.2 wt. % doped system exhibit the highest storage modulus and Tg as compared to neat and other loading percentages. TGA results show that amino functionalized MWCNTs samples are more thermally stable.

Preparation, Characterization and Properties of Biodegradable GO/PPC Composites

2013 ◽  
Vol 469 ◽  
pp. 112-116
Author(s):  
Xia He ◽  
Ling Ling Wu ◽  
Jia Jun Wang ◽  
Hai Long Liu
Keyword(s):  
Thermal Properties ◽  
Food Packaging ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Promising Alternative ◽  
Solution Blending ◽  
Blending Method ◽  
Ft Ir ◽  
Poly Propylene

A novel biodegradable and biocompatible composite of Poly (propylene carbonate) (PPC) and graphenes oxide (GO) was prepared by a solution blending method. The chemical structure, thermal properties and microscopic morphologies of the GO/PPC composites were characterized by Fourier transform infrared spectroscopy (FT-IR), thermo gravimetric analysis (TGA) and scanning electron microscopy (SEM). It was shown that the GO/PPC composites with 0.75 wt% GO performed a significant improvement on mechanical properties and thermal properties, as compared with the neat PPC. This composite could become a promising alternative to non-biodegradable for food packaging materials.

Synthesis of Silsesquioxane-Contained Benzoxazine and the Thermal Properties of its High Performance Polymer

2013 ◽  
Vol 849 ◽  
pp. 248-252
Author(s):  
Hong Xia Yan ◽  
Yuan Jia ◽  
Yi Chen Feng ◽  
Ting Ting Li
Keyword(s):  
Fourier Transform ◽  
Thermal Properties ◽  
Infrared Spectroscopy ◽  
High Performance ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Free Process ◽  
High Performance Polymer ◽  
Oligomeric Silsesquioxane

A new kind of high performance benzoxazine (BOZ) was synthesized from p-aminophenol functionalized chloropropyl polyhedral oligomeric silsesquioxane (AP-POSS), aniline and paraformaldehyde through a solvent-free process. Fourier transform infrared spectroscopy (FTIR) was employed to characterize the structure of the new BOZ resin contained POSS (POSS-BOZ). The differential scanning calorimeter (DSC) was chosen to research the curing behavior of the new resin, and the thermo gravimetric analysis (TGA) was chosen to research the thermal properties. The results show that the POSS-BOZ is successfully synthesized, and the POSS-BOZ also exhibits better thermal performance in comparison with bisphenol-A benzoxazine (bA-BOZ).

Coordination Compounds of Some 3d-Transition Metal Ions with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)- thiosemicarbazide

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Madalina Angelusiu ◽  
Maria Negoiu ◽  
Stefania-Felicia Barbuceanu ◽  
Tudor Rosu
Keyword(s):  
Coordination Compounds ◽  
Magnetic Moments ◽  
Thermo Gravimetric Analysis ◽  
Electronic Spectroscopy ◽  
Transition Metal Ions ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
New Compounds

The paper presents the synthesis and characterization of Cu(II), Co(II), Ni(II), Cd(II), Zn(II) and Hg(II) complexes with N1-[4-(4-bromo-phenylsulfonyl)-benzoyl]-N4-(4-methoxyphenyl)-thiosemicarbazide. The new compounds were characterized by IR, EPR, electronic spectroscopy, magnetic moments, thermo-gravimetric analysis and elemental analysis.

Sign in / Sign up

Export Citation Format

Share Document